Gate-valve.



G. P ANDERSON.

GATE VALVE.

APPLIOATION FILED Nov. 4, 1912.

1,092,421, Patented Apr. 7, 191

WITNESSES: IIVVENTOI? r W ATTORNEY UNITED STATES CHARLES PIKE ANDERSON, OF SEATTLE, WASHING-TON.

GATE-VALVE.

Specification of Letters Patent. 4

Patented Apr. 7, 1914.

Application filed November 4, 1912. Serial No. 729,867

To all whom it may concern;

Be it known that I, CHARLES PIKE AN- DERSON, a citizen of the United States, residing at Seattle, in the county of King and State of Washington, have invented certain new and useful Improvements in Gate- Valves, of which the following is a specification.

The object of this invention is the perfecting of gate valves to render them better adapted to ordinary service or where it is required to control a fluid under pressure, by the provision of a liner for the valvebody which serves both for the valve seats and the valve packing, together with novel devices whereby such member is effectually held in operative position. These ends are attained by the means hereinafter set forth and illustrated in the accompanying drawings, in which- Figure 1 is a vertical sectional view of a gate valve embodying my invention. Fig. 2 is a perspective view of the valve-body liner; and Fig. 3 is a similar view of the frame member for securing the same in place.

The reference numeral 5 designates thebody of the valve having alined induction and eduction passages 6 which communicate with a centrally disposed chamber provided with oppositely inclined wall surfaces 7 At the top of the valve-body is an extension 8 within which is a compartment 9 of a diameter greater than the distance between the wallsurfaces 7 to afiord shelves 10 at the upper ends of the respective wall-surfaces.

11 represents a cap detachably connected to the upper end of the extension 8 and is formed with the usual extension 12 having a packing nut 13 at its top and through which passesthe stem 14, having a suitable handle 15. The interior of extension 12 is screw-threaded to engage with threads provided on the stem for operating the valve. The stem has at its lower end a head 16 which is seated in a recess provided in the upper end of a wedge-shaped valve 17 having faces 18 which are inclined to be in the same angular relations with respect to each other as the respective wall faces 8, or approximately so.

A. liner of a yielding material, such as vleather or lead, is provided for covering the wall surfaces 7, Such liner is desirably formed by a sheet ofmaterial which, as shown 1 n F 1g. 2, is folded medially of its length into a substantially V-shaped configuration to provide a loop 19 and two leaves 20 which terminate in outwardly directed flaps 21. Port openings 20 are provided in the respective leaves 20, as shown. This member is placed within the valvebody so. that the leaves 20 will be juxtaposed with the wall surfaces 7 and the flaps 21 -extend over the shelves 10, as clearly shown 1n Fig. 1. To secure such member to the body, I employ a frame member, shown detached in Fig. 3, comprising two spaced Wedge-shaped side elements 23 connected by a' transverse bar 24: at their lower ends and by spaced plate elements 25 at the upper ends of the same. The remote edges 26 of plate elements 25 are formed of arcuate shapes so as to fit within the compartment 9 and afford a relatively large surface to bear upon the flaps 20.

The parts being thus constructed, and the liner being first placed within the body, as above explained, the frame is introduced. Screws 27 are then inserted throu h aper tures 28 and 29 provided in said 'aps and plate-elements and engaged in screw threaded holes provided in the shelves 10. By further screwing down the screws, the frame member is correspondingly moved so that the bar 24: thereof engages in the loop 19 of the liner to eflect a tension to the leaves 20 and which are ultimately clamped between the edges 23' of the frame elements 23 and the opposing surfaces 7 of the said valve-body chamber.

By making a liner of relatively soft material it is unnecessary to machine any valve faces which in gate-valves is an expensive operation. Furthermore, the liners which, in this instance, serve as valve-seats are firmly wedged, so to speak, by the frame against the walls 7 and, being held about their edges, are consequently made welladapted to withstand any duty to which they are likely to be subjected and endure for a longer time than if otherwise secured.

By removing the cap 11 and withdrawing screws 27 the frame member may readily be removed for replacing the liner.

What I claim, is-

1. A gate-valve having a liner provided with opposing orts which are arranged to respectively register with both the inlet and outlet passages of the va1ve-body,a frame member adapted to be adjusted to stretch said liner and be subsequently fastened to the valve body for securing the liner thereto.

2. 'In a gate-valve, the combination with the valve-body having a chamber with inclined opposing Walls and provided with shelves at the upper ends of the latter, of a substantially V-shaped liner having terminal flaps, a frame member comprising V- shaped side elements, a bar connecting the lower ends of the side elements, plate elements connecting the upper ends of the respective side elements, and screws extending through the adjacent plate elements and the flaps for securin the liner at the top to the valve-body, sai side elements serving to hold the liner about its lateral edges to the aforesaid walls.

3. In a gate-valve, the combination of a valve-body formed with a chamber having inclined opposing walls, a substantially V- shaped liner for said Walls, a frame-member, and means for securing said framemember to the valve-body for securing said liner tothe latter, said frame-member also serving to clamp the liner'about its lateral edges to the aforesaid walls.

Signed at Seattle, Wash, this 29th day of October, 1912.

CHARLES PIKE ANDERSON.

Witnesses:

F. G. MATHENY, E. PETERSON. 

